121021102201 has 4 divisors (see below), whose sum is σ = 121022119332. Its totient is φ = 121020085072.

The previous prime is 121021102187. The next prime is 121021102217. The reversal of 121021102201 is 102201120121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 102201120121 = 1217 ⋅83977913.

It can be written as a sum of positive squares in 2 ways, for example, as 51449126976 + 69571975225 = 226824^2 + 263765^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021102201 - 2¹⁷ = 121020971129 is a prime.

It is a super-2 number, since 2×121021102201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021102261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302170 + ... + 577363.

It is an arithmetic number, because the mean of its divisors is an integer number (30255529833).

Almost surely, 2^121021102201 is an apocalyptic number.

It is an amenable number.

121021102201 is a deficient number, since it is larger than the sum of its proper divisors (1017131).

121021102201 is an equidigital number, since it uses as much as digits as its factorization.

121021102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017130.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121021102201 its reverse (102201120121), we get a palindrome (223222222322).

The spelling of 121021102201 in words is "one hundred twenty-one billion, twenty-one million, one hundred two thousand, two hundred one".